Sarah had $18 more than Pamela at first. After Sarah and Pamela spent an equal amount of money, Pamela had
710 as much as Sarah. How much money did Sarah have left?
| |
Sarah |
Pamela |
Difference |
| Before |
1 u + $18 |
1 u |
$18 |
| Change |
- 1 |
- 1 |
|
| After |
10 p |
7 p |
3 p |
Difference in the amounts between Sarah and Pamela
= 10 p - 7 p
= 3 p
Since both Sarah and Pamela spent an equal amount, the difference in the amounts that Sarah and Pamela had at first and in the end remains unchanged.
3 p = 18
1 p = 18 ÷ 3 = 6
Amount that Sarah had left
= 10 p
= 10 x 6
= $60
Answer(s): $60
